I am using windows 8 laptop where i have installed PMS and both my PS3 and laptops were connected wirelessly using at&t 2WIRE modem. I came to know that UPNP is not enabled in the modem and added my PS3 to DMZ. But still I am not able to connect it to PS3. I am getting an error no renderer found. I am not sure what was the problem. Please help me on this.

do i need to do any port forwarding for my PC. If so please guide me how to do it.